Valve-grinding device



Nov. 11, 1930. TRAHAN 1,781,417

VALVE GRINDING DEVICE File d April 11, 1930 lljlllllllllllllllllllllllilIN V EN TOR. %ado/k Wa /ia ATTORNEYS.

Patented Nov. ll, 1930 PATENT OFFICE RUDOLPH TRAHAN, OF RUMSTICK POINT,RHODE ISLAND VALVE-GRl'NDING DEVICE 3 n ncatio filed April 11,

`This invcntion relates to a Valve grinding de/vice, and has for itsobject to facilitate the grinding of valves, the stens of which haveenlargements at both ends to prevent the valve sten froni being drawnaxially through its guide. y

A further object of this invention is to provide means which will holdthe guide, which must necessarily be made in separahle sections, inassembled relation, and at the same time serve the, additional purposeof raising the valve from its seat when the grinding pressure upon it isreleased.

'With these and other objects and ad vantageous features in View, theinvention consists of a novel arrangement of parts more fully disclosedin the detailed description following in conjunction with the acconipanying drawings, and more particularly set forth in the appended clans.

In the drawings: 4 Fig. 1 is a fragmental sectional view of an engineshowing a valve in substantially y its relation to its seat with thevalve grinding device of this invention in working position;

Fg. 2 is a sectional View of the valve; V Fg. 3 is a perspective View ofthe sections of the guide member; y Fg. i is a side elevation of thespring; and ti;) Fig. 5 is a side elevaton of the device in assembledrelation about the valve and ready for insertion therein through thevalve seat opening.

In certain automobiles, particularly the model A Ford, the valves are soconstructed as to make grinding thereot difficult, even 'for theexperienced. nechanic, by reason of an integral enlargenent at the lowerportion of the valve sten preventing axal renoval, the Construct onbeing such thatthe i valveguide itself mustbe removed 'froni the boreadjacent the valve port'in order to permit the removal of, the valve asis necessary for grinding purposes during which this guide must befrequently inserted and removed to acconplish the desired result. Thisguide which must be handled is made in sections and permit of theirbeing dropped, increasing the labor and annoyance to the nechanicworking upon the same; and in 1930. Serial :1570. 443328.

, I order to facilitate 'the grinding of a valve of this character, Ihave provided a section al body meniher which may be assembled about thevalve stem after its usual guide has been removed froni the engineblock, which guide i znay be inserted through the valve seat openinginto the valve stern boreof the engine block from the upper end, and Ihave provided a `coil spring to hold the sections in assembled relation,and at the same time serve toyeldi ingly lift the valve head from itsseat upon the release of grinding pressure; and the `following adetailed description of the present embodiment of this inventionillustrating the preferred means by' which these u ades vantageousresults may be'accomplishedfi 1 lVith reference to the drawings, 10designates a cylinder block, shown 'ragnentally in Figure l, which has aground valve seat 11"for receivingthe ground portion 12 O 'TO the valve`head 13 to control the entrance from either the intakeor exhaust port 14to the combustion :chamber above the valve head, not illustrated. i

Thevalve, which is typical of the model A` Ford, has a. valve sten 15extending from the head 13 with an enlarged lower end 16 tapered asshown in the drawingfwhich prevents the valve froni being drawn aXiallythrough its guide, not shown, which is inserted upwardly in thedirection of the arrow 17 into the lower end of the bore 18 of the block10. In order that a valve of this character such as usedin the model AFord motor may be ground, the usualvalve guide, not` shown, must beremoved downwardly in a direction opposite to the arrow 17 froni thebore18, after which the valve may be re moved and the valve grinding deviceassen- 'b lecl about the valve steni 15, the same con- *W 'ssting of abody portion forinecl in sections, preterably in halves,` 19, grooved asat20 to form when asseinbled, a bore fitting the valvestem 15, butslidable thereon, tor guiding thesane in its movement. i i i The body iscylindrical on its outer surface to fit the cylindrical bore 18 intowhich the lower portion 21 of this body may be inserted to rest upon the`shoulder22 formed by` the fiange 23 extending from its outer surface.`"1

The upper portion 24 of the body is also ey lindricsl and receives atightly ooiled portion 25 of the helical spring 26 which holds thehalves or sections ofthe body in assenlolecl relation about the valvesten 15,' and as this spring 26 normally assumes an axially eX- t d h ll fermat a it nga es n at the vehte head '13 and 'resiliently hits thesame froni its seat 11, which is of oonvenience e m in grincling thevalve in order to better (lis tribute the abrasivemateriaslused. Afterg'rincling is aocomplishecl by 'suitable movement 'between thelvlve headand its seat," the 'body 19 of the leve may be liftecl fromthe bore 1-8;the spring-removel from the sections and ,the sections sep misteri 5micl taken -'ronthe mire sten, after `which the e may he 'inserted intoits seat, the 'utoniy guide replaced in the lower end of the bore' 18,its springplaced about the t m a d h i led? m m el n a ed h h dend Qithei y the 'use of this devieey the same may l :entir y ss mbl d be or 't min thefl :18' for &fi n b g more. on- Venientencl afording a saving .oftime, and si??? s nec sm'y, th en k m r the upper portion above saidfiange being cylinclrioal [substntially throughout its length 'and acoiled spring surrounding the upper portion of said body and tightlyfitting the samefor'holding the sections in assemblecl relaton and.adaptecl: to surrouncl the a ve te &D g .h 'YlV h and resi lien tly liftthe same-fron itsseat. s e

lhtonbhtion-r use in grincling a va'lve'seat, a one-piece valVeconprising a `stem 'he iee@ hea essen-,61 ,With finished seat, and anenlargement at its 'opposite end,

a guide cnmpri'sing abocly portion consisting of a plurality'ofseparable sections to fit about the stern of the ValVe -and" guide itin rhee' and sem e m h b n of the eng ne block clmcent the velve seat,and .a

.imi fightly 'fitting the sanie to'holol 'the' sections n assen'blejclrelation about said stein BUDLOLPH' TBAHAN;

Vhle I have .described oertaineonstruc- I I mamam i h ch embody he pr n'ples .of

, I aim:

1 Avalve stern guide ;al-nd ylye lifterfor use j y i i i .40 in lingm rompr t rg e b y port Gonsisti ng of plur zility o'seperehle sections' ii tor ngagng a ii xti e :Of t bo y. to hold the sec i s; as le l and ;tof th i re' rom itss a l e ml ve sten'i guide ,and yalve l'ter fornse iin 'grincl-ng Vales oon p r isriga` body portion oh ting e p u ali tyof..spa ab se t n 'intoth' bo n th eng o k, and@ sp i g e hroug wh aht sim ft y l to b ground is guiclecl, sil hocly being' insiertable V i k sptm r 'in to {the bore of en ne s h "Qe bel w 'spring enireling' theupper end of said body i v

